package org.kse.gui.crypto.distributionpoints;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.Point;
import java.awt.Toolkit;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ResourceBundle;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.ScrollPaneConstants;
import javax.swing.table.TableColumn;
import javax.swing.table.TableRowSorter;

import org.bouncycastle.asn1.x509.CRLDistPoint;
import org.bouncycastle.asn1.x509.DistributionPoint;
import org.kse.gui.CursorUtil;
import org.kse.gui.JKseTable;
import org.kse.gui.PlatformUtil;
import org.kse.utilities.os.OperatingSystem;

public class JDistributionPoints extends JPanel {

	private static final long serialVersionUID = 1L;
	private static ResourceBundle res = ResourceBundle.getBundle("org/kse/gui/crypto/distributionpoints/resources");

	private JPanel jpDistributionPointsButtons;
	private JButton jbAdd;
	private JButton jbEdit;
	private JButton jbRemove;
	private JScrollPane jspDistributionPoints;
	private JKseTable jtDistributionPoints;

	private String title;
	private boolean enabled = true;

	public JDistributionPoints(String title) {
		this.title = title;
		initComponents();
	}

	private void initComponents() {
		jbAdd = new JButton(new ImageIcon(
				Toolkit.getDefaultToolkit().createImage(getClass().getResource("images/add_distribution_nms.png"))));
		jbAdd.setMargin(new Insets(2, 2, 0, 0));
		jbAdd.setToolTipText(res.getString("JDistributionPoints.jbAdd.tooltip"));
		jbAdd.setMnemonic(res.getString("JDistributionPoints.jbAdd.mnemonic").charAt(0));

		jbAdd.addActionListener(evt -> {
			try {
				CursorUtil.setCursorBusy(JDistributionPoints.this);
				addPressed();
			} finally {
				CursorUtil.setCursorFree(JDistributionPoints.this);
			}
		});

		jbEdit = new JButton(new ImageIcon(
				Toolkit.getDefaultToolkit().createImage(getClass().getResource("images/edit_distribution_nms.png"))));
		jbEdit.setMargin(new Insets(2, 2, 0, 0));
		jbEdit.setToolTipText(res.getString("JDistributionPoints.jbEdit.tooltip"));
		jbEdit.setMnemonic(res.getString("JDistributionPoints.jbEdit.mnemonic").charAt(0));

		jbEdit.setEnabled(false);

		jbEdit.addActionListener(evt -> {
			try {
				CursorUtil.setCursorBusy(JDistributionPoints.this);
				editPressed();
			} finally {
				CursorUtil.setCursorFree(JDistributionPoints.this);
			}
		});

		jbRemove = new JButton(new ImageIcon(
				Toolkit.getDefaultToolkit().createImage(getClass().getResource("images/remove_distribution_nms.png"))));
		jbRemove.setMargin(new Insets(2, 2, 0, 0));
		jbRemove.setToolTipText(res.getString("JDistributionPoints.jbRemove.tooltip"));
		jbRemove.setMnemonic(res.getString("JDistributionPoints.jbRemove.mnemonic").charAt(0));

		jbRemove.setEnabled(false);

		jbRemove.addActionListener(evt -> {
			try {
				CursorUtil.setCursorBusy(JDistributionPoints.this);
				removePressed();
			} finally {
				CursorUtil.setCursorFree(JDistributionPoints.this);
			}
		});

		jpDistributionPointsButtons = new JPanel();
		jpDistributionPointsButtons.setLayout(new BoxLayout(jpDistributionPointsButtons, BoxLayout.Y_AXIS));
		jpDistributionPointsButtons.add(Box.createVerticalGlue());
		jpDistributionPointsButtons.add(jbAdd);
		jpDistributionPointsButtons.add(Box.createVerticalStrut(3));
		jpDistributionPointsButtons.add(jbEdit);
		jpDistributionPointsButtons.add(Box.createVerticalStrut(3));
		jpDistributionPointsButtons.add(jbRemove);
		jpDistributionPointsButtons.add(Box.createVerticalGlue());

		DistributionPointsTableModel distributionPointsTableModel = new DistributionPointsTableModel();
		jtDistributionPoints = new JKseTable(distributionPointsTableModel);

		TableRowSorter<DistributionPointsTableModel> sorter = new TableRowSorter<>(distributionPointsTableModel);
		sorter.setComparator(0, new DistributionPointsTableModel.DistributionPointComparator());
		jtDistributionPoints.setRowSorter(sorter);

		jtDistributionPoints.setShowGrid(false);
		jtDistributionPoints.setRowMargin(0);
		jtDistributionPoints.getColumnModel().setColumnMargin(0);
		jtDistributionPoints.getTableHeader().setReorderingAllowed(false);
		jtDistributionPoints.setAutoResizeMode(JKseTable.AUTO_RESIZE_ALL_COLUMNS);
		jtDistributionPoints.setRowHeight(Math.max(18, jtDistributionPoints.getRowHeight()));

		for (int i = 0; i < jtDistributionPoints.getColumnCount(); i++) {
			TableColumn column = jtDistributionPoints.getColumnModel().getColumn(i);
			column.setHeaderRenderer(
					new DistributionPointsTableHeadRend(jtDistributionPoints.getTableHeader().getDefaultRenderer()));
			column.setCellRenderer(new DistributionPointsTableCellRend());
		}

		ListSelectionModel selectionModel = jtDistributionPoints.getSelectionModel();
		selectionModel.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		selectionModel.addListSelectionListener(evt -> {
			if (!evt.getValueIsAdjusting()) {
				updateButtonControls();
			}
		});

		jtDistributionPoints.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent evt) {
				maybeEditGeneralName(evt);
			}
		});

		jtDistributionPoints.addKeyListener(new KeyAdapter() {
			boolean deleteLastPressed = false;

			@Override
			public void keyPressed(KeyEvent evt) {
				// Record delete pressed on non-Macs
				if (!OperatingSystem.isMacOs()) {
					deleteLastPressed = evt.getKeyCode() == KeyEvent.VK_DELETE;
				}
			}

			@Override
			public void keyReleased(KeyEvent evt) {
				// Delete on non-Mac if delete was pressed and is now released
				if (!OperatingSystem.isMacOs() && deleteLastPressed && evt.getKeyCode() == KeyEvent.VK_DELETE) {
					try {
						CursorUtil.setCursorBusy(JDistributionPoints.this);
						deleteLastPressed = false;
						removeSelectedDistributionPoint();
					} finally {
						CursorUtil.setCursorFree(JDistributionPoints.this);
					}
				}
			}

			@Override
			public void keyTyped(KeyEvent evt) {
				// Delete on Mac if back space typed
				if (OperatingSystem.isMacOs() && evt.getKeyChar() == 0x08) {
					try {
						CursorUtil.setCursorBusy(JDistributionPoints.this);
						removeSelectedDistributionPoint();
					} finally {
						CursorUtil.setCursorFree(JDistributionPoints.this);
					}
				}
			}
		});

		jspDistributionPoints = PlatformUtil.createScrollPane(jtDistributionPoints,
				ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
		jspDistributionPoints.getViewport().setBackground(jtDistributionPoints.getBackground());

		this.setLayout(new BorderLayout(5, 5));
		setPreferredSize(new Dimension(250, 150));
		add(jspDistributionPoints, BorderLayout.CENTER);
		add(jpDistributionPointsButtons, BorderLayout.EAST);

		selectFirstGeneralNameInTable();
		updateButtonControls();
	}

	/**
	 * Get general names.
	 *
	 * @return General names
	 */
	public CRLDistPoint getCRLDistPoint() {
		return new CRLDistPoint(getDistributionPointsTableModel().getData().toArray(new DistributionPoint[0]));
	}

	/**
	 * Set general names.
	 *
	 * @param generalNames General names
	 */
	public void setCRLDistPoint(CRLDistPoint cRLDistPoint) {
		getDistributionPointsTableModel().load(cRLDistPoint);
	}

	/**
	 * Sets whether or not the component is enabled.
	 *
	 * @param enabled True if this component should be enabled, false otherwise
	 */
	@Override
	public void setEnabled(boolean enabled) {
		this.enabled = enabled;

		updateButtonControls();
	}

	/**
	 * Set component's tooltip text.
	 *
	 * @param toolTipText Tooltip text
	 */
	@Override
	public void setToolTipText(String toolTipText) {
		super.setToolTipText(toolTipText);
		jspDistributionPoints.setToolTipText(toolTipText);
		jtDistributionPoints.setToolTipText(toolTipText);
	}

	private void addPressed() {
		Container container = getTopLevelAncestor();

		DDistributionPointsChooser distributionPointsChooser = null;

		if (container instanceof JDialog) {
			distributionPointsChooser = new DDistributionPointsChooser((JDialog) container, title, null);
		} else {
			distributionPointsChooser = new DDistributionPointsChooser((JFrame) container, title, null);
		}

		distributionPointsChooser.setLocationRelativeTo(container);
		distributionPointsChooser.setVisible(true);

		DistributionPoint newDistributionPoint = distributionPointsChooser.getDistributionPoint();

		if (newDistributionPoint == null) {
			return;
		}

		getDistributionPointsTableModel().addRow(newDistributionPoint);

		selectDistributionPointInTable(newDistributionPoint);
		updateButtonControls();
	}

	private void removePressed() {
		removeSelectedDistributionPoint();
	}

	private void removeSelectedDistributionPoint() {
		int selectedRow = jtDistributionPoints.getSelectedRow();

		if (selectedRow != -1) {
			((DistributionPointsTableModel) jtDistributionPoints.getModel()).removeRow(selectedRow);

			selectFirstGeneralNameInTable();
			updateButtonControls();
		}
	}

	private void editPressed() {
		editSelectedGeneralName();
	}

	private void maybeEditGeneralName(MouseEvent evt) {
		if (evt.getClickCount() > 1) {
			Point point = new Point(evt.getX(), evt.getY());
			int row = jtDistributionPoints.rowAtPoint(point);

			if (row != -1) {
				try {
					CursorUtil.setCursorBusy(JDistributionPoints.this);
					jtDistributionPoints.setRowSelectionInterval(row, row);
					editSelectedGeneralName();
				} finally {
					CursorUtil.setCursorFree(JDistributionPoints.this);
				}
			}
		}
	}

	private void updateButtonControls() {
		if (!enabled) {
			jbAdd.setEnabled(false);
			jbEdit.setEnabled(false);
			jbRemove.setEnabled(false);
		} else {
			jbAdd.setEnabled(true);

			int selectedRow = jtDistributionPoints.getSelectedRow();

			if (selectedRow == -1) {
				jbEdit.setEnabled(false);
				jbRemove.setEnabled(false);
			} else {
				jbEdit.setEnabled(true);
				jbRemove.setEnabled(true);
			}
		}
	}

	private void editSelectedGeneralName() {
		int selectedRow = jtDistributionPoints.getSelectedRow();

		if (selectedRow != -1) {

			DistributionPoint distributionPoint = (DistributionPoint) jtDistributionPoints.getValueAt(selectedRow, 0);

			Container container = getTopLevelAncestor();

			DDistributionPointsChooser distributionPointsChooser = null;

			if (container instanceof JDialog) {
				distributionPointsChooser = new DDistributionPointsChooser((JDialog) container, title,
						distributionPoint);
			} else {
				distributionPointsChooser = new DDistributionPointsChooser((JFrame) container, title,
						distributionPoint);
			}

			distributionPointsChooser.setLocationRelativeTo(container);
			distributionPointsChooser.setVisible(true);

			DistributionPoint newDistributionPoint = distributionPointsChooser.getDistributionPoint();

			if (newDistributionPoint == null) {
				return;
			}

			getDistributionPointsTableModel().removeRow(selectedRow);
			getDistributionPointsTableModel().addRow(newDistributionPoint);

			selectDistributionPointInTable(newDistributionPoint);
			updateButtonControls();
		}
	}

	private void selectDistributionPointInTable(DistributionPoint newDistributionPoint) {
		for (int i = 0; i < jtDistributionPoints.getRowCount(); i++) {
			if (newDistributionPoint.equals(jtDistributionPoints.getValueAt(i, 0))) {
				jtDistributionPoints.changeSelection(i, 0, false, false);
				return;
			}
		}
	}

	private void selectFirstGeneralNameInTable() {
		if (getDistributionPointsTableModel().getRowCount() > 0) {
			jtDistributionPoints.changeSelection(0, 0, false, false);
		}
	}

	private DistributionPointsTableModel getDistributionPointsTableModel() {
		return (DistributionPointsTableModel) jtDistributionPoints.getModel();
	}

}
